Crystal, D. (2003). English as a global language (2nd ed.). Cambridge University Press.
Chicagoスタイル(17版)引用形式Crystal, David. English as a Global Language. 2nd ed. New York ; New Delhi: Cambridge University Press, 2003.
MLA(8版)引用形式Crystal, David. English as a Global Language. 2nd ed. Cambridge University Press, 2003.
警告: この引用は必ずしも正確ではありません.